Sep 18, 2019 · 6,800 CFM 115V Side-Draft Aspen Roof/Side Evap Cooler (Swamp Cooler) for 20 in. Ducts 2,400 sq. ft. (Motor not Included) 6500 CFM Side-Draft Wall/Roof Evaporative Cooler for 2300 sq. ft. (Motor Not Included) 7000 CFM 115 Volt 2-Speed Down/Side Discharge Roof Top Evaporative Cooler for 2500 sq. ft. (with Motor)